Solve the logarithmic equation.log (x + 10) - log (x + 4) = log x
A. 6
B. 2, -5
C. 2
D. ?
Answer: C
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Find the current ratio and the acid-test ratio for the indicated year. Round each ratio to the nearest hundredth of a percent.
Last year current liabilities were $244,000.
A. 1.36; 0.67 B. 1.36; 0.81 C. 1.06; 0.81 D. 1.06; 0.69
Solve the problem.A zoom lens in a camera makes a rectangular image on the film that is 7 cm × 4 cm. As the lens zooms in and out, the size of the image changes. Find the rate at which the area of the image begins to change (dA/df) if the length of the frame changes at 0.5cm/s and the width of the frame changes at 0.3 cm/s.
A. 4.7 m2/s
B. 
m2/2
C. 4.1 m2/s
D. 1.025 m2/s
Solve the pair of linear equations by addition.
If there is one common solution, select the correct ordered pair of the point of intersection. If there is no one common solution, select either parallel or coincide for the correct answer.
A. 
B. 
C. 
D. The lines are parallel.
E. The lines coincide.
Find the equation of the circle satisfying the given conditions.With endpoints of a diameter at (-2, -6) and (-8, 2).
A. (x + 5)2 + (y + 2)2 = 5 B. (x + 5)2 + (y + 2)2 = 25 C. (x - 5)2 + (y - 2)2 = 100 D. (x - 5)2 + (y - 2)2 = 25